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drivers/power: add pm_unregister

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This commit is contained in:
Juha Niskanen
2018-03-06 07:59:17 -06:00
committed by Gregory Nutt
parent 0b277da5fa
commit d8311b6493
7 changed files with 290 additions and 8 deletions
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Documentation/NuttxPortingGuide.html
+24 -4
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@@ -6814,7 +6814,7 @@ void pm_initialize(void);
</pre></ul>
<p><b>Description:</b>
This function is called by MCU-specific one-time at power on reset in order to initialize the power management capabilities.
This function must be called <i>very</i> early in the initialization sequence <i>before</i> any other device drivers are initialize (since they may attempt to register with the power management subsystem).
This function must be called <i>very</i> early in the initialization sequence <i>before</i> any other device drivers are initialized (since they may attempt to register with the power management subsystem).
</p>
<p><b>Input Parameters:</b>
None
@@ -6843,7 +6843,27 @@ int pm_register(FAR struct pm_callback_s *callbacks);
Zero (<code>OK</code>) on success; otherwise a negated <code>errno</code> value is returned.
</p>
<h4><a name="pmactivity">6.5.2.3 <code>pm_activity()</code></a></h4>
<h4><a name="pmunregister">6.5.2.3 <code>pm_unregister()</code></a></h4>
<p><b>Function Prototype:</b></p>
<ul><pre>
#include &lt;nuttx/power/pm.h&gt;
int pm_unregister(FAR struct pm_callback_s *callbacks);
</pre></ul>
<p><b>Description:</b>
This function is called by a device driver in order to unregister previously registered power management event callbacks.
Refer to the <a href="#pmcallbacks">PM Callback</a> section for more details.
</p>
<p><b>Input Parameters:</b>
<dl>
<dt><code>callbacks</code>
<dd>An instance of <code>struct pm_callback_s</code> providing the driver callback functions.
</dl>
</p>
<p><b>Returned Value:</b>
Zero (<code>OK</code>) on success; otherwise a negated <code>errno</code> value is returned.
</p>
<h4><a name="pmactivity">6.5.2.4 <code>pm_activity()</code></a></h4>
<p><b>Function Prototype:</b></p>
<ul><pre>
#include &lt;nuttx/power/pm.h&gt;
@@ -6872,7 +6892,7 @@ void pm_activity(int domain, int priority);
This function may be called from an interrupt handler (this is the ONLY PM function that may be called from an interrupt handler!).
</p>
<h4><a name="pmcheckstate">6.5.2.4 <code>pm_checkstate()</code></a></h4>
<h4><a name="pmcheckstate">6.5.2.5 <code>pm_checkstate()</code></a></h4>
<p><b>Function Prototype:</b></p>
<ul><pre>
#include &lt;nuttx/power/pm.h&gt;
@@ -6902,7 +6922,7 @@ enum pm_state_e pm_checkstate(int domain);
The recommended power management state.
</p>
<h4><a name="pmchangestate">6.5.2.5 <code>pm_changestate()</code></a></h4>
<h4><a name="pmchangestate">6.5.2.6 <code>pm_changestate()</code></a></h4>
<p><b>Function Prototype:</b></p>
<ul><pre>
#include &lt;nuttx/power/pm.h&gt;